<template>
  <el-table :data="formatData" :row-style="showRow" v-bind="$attrs">
    <!-- 如果传递props没有注册的属性时.则用attrs接收 -->
    <el-table-column align="center" v-if="columns.length===0" width="150">
      <template slot-scope="scope">
        <span v-for="space in scope.row._level" :key="space" class="ms-tree-space"/>
        <span v-if="iconShow(0,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded" class="el-icon-plus"/>
          <i v-else class="el-icon-minus"/>
        </span>
        {{ scope.$index }}
      </template>
    </el-table-column>
   
    <el-table-column align="left" v-for="(column, index) in columns" v-else :key="column.value" :label="column.text" :width="column.width">
      <template slot-scope="scope">
        <!-- Todo -->
        <!-- eslint-disable-next-line vue/no-confusing-v-for-v-if -->
        <span v-if="radioShow(index,scope.row)">
          <el-radio :label="scope.$index" v-model="radioSelect" @change.native="getTemplateRow(scope.$index,scope.row)">{{''}}</el-radio>
        </span>
        <span v-for="space in scope.row._level" v-if="index === 1" :key="space" class="ms-tree-space"/>
        <span v-if="iconShow(index,scope.row)" class="tree-ctrl" @click="toggleExpanded(scope.$index)">
          <i v-if="!scope.row._expanded" class="el-icon-plus"/>
          <i v-else class="el-icon-minus"/>
        </span>
        {{ scope.row[column.value] }}
      </template>
    </el-table-column>
    <slot/>
  </el-table>
</template>

<script>
/**
  Auth: Lei.j1ang
  Created: 2018/1/19-13:59
*/
import Bus from "@/components/bus";
import treeToArray from "./eval";
export default {
  name: "TreeTable",
  data() {
    return {
      radioSelect: {}
    };
  },
  props: {
    clean: Object,
    /* eslint-disable */
    data: {
      type: [Array, Object],
      required: true
    },
    columns: {
      type: Array,
      default: () => []
    },
    evalFunc: Function,
    evalArgs: Array,
    expandAll: {
      type: Boolean,
      default: false
    }
  },
  mounted() {},
  watch: {
    clean: {
      handler(newV, oldV) {
        if(Object.keys(newV).length===0){
           this.radioSelect =-1;
        }   
      },
      deep: true
    }
  },
  computed: {
    // 格式化数据源
    formatData: function() {
      let tmp;
      if (!Array.isArray(this.data)) {
        tmp = [this.data];
      } else {
        tmp = this.data;
      }
      const func = this.evalFunc || treeToArray;
      const args = this.evalArgs
        ? Array.concat([tmp, this.expandAll], this.evalArgs)
        : [tmp, this.expandAll];
      return func.apply(null, args);
    }
  },
  methods: {
    showRadio() {},
    showRow: function(row) {
      console.log(row);
      const show = row.row.parent
        ? row.row.parent._expanded && row.row.parent._show
        : true;
      row.row._show = show;
      return show
        ? "animation:treeTableShow 1s;-webkit-animation:treeTableShow 1s;"
        : "display:none;";
    },
    // 切换下级是否展开
    toggleExpanded: function(trIndex) {
      const record = this.formatData[trIndex];

      console.log(record);
      console.log(trIndex);
      
      record._expanded = !record._expanded;
    },
    // 图标显示
    iconShow(index, record) {
      return index === 1 && record.children && record.children.length > 0;
    },
    //显示radio
    radioShow(index, record) {
      return index === 0;
    },
    showIndex(index, row) {
      if (index === 1) {
        return (index += 1);
      }
    },
    getTemplateRow(index, row) {
      console.log(index, row);
      this.$emit("selectRow", row);
    }
  }
};
</script>
<style rel="stylesheet/css">
@keyframes treeTableShow {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@-webkit-keyframes treeTableShow {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
</style>

<style lang="scss" rel="stylesheet/scss" scoped>
$color-blue: #2196f3;
$space-width: 18px;
.ms-tree-space {
  position: relative;
  top: 1px;
  display: inline-block;
  font-style: normal;
  font-weight: 400;
  line-height: 1;
  width: $space-width;
  height: 14px;
  &::before {
    content: "";
  }
}
.processContainer {
  width: 100%;
  height: 100%;
}
table td {
  line-height: 26px;
}

.tree-ctrl {
  position: relative;
  cursor: pointer;
  color: $color-blue;
  margin-left: -$space-width;
}
</style>
